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Full Freeview on the Limavady (Northern Ireland) transmitter

first published this on - UK Free TV
sa_streetviewGoogle Streetviewsa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps55.108,-6.887 or 55°6'30"N 6°53'14"Wsa_postcodeBT49 9LJ

 

The symbol shows the location of the Limavady (Northern Ireland) transmitter which serves 45,000 homes. The bright green areas shown where the signal from this transmitter is strong, dark green areas are poorer signals. Those parts shown in yellow may have interference on the same frequency from other masts.

This transmitter has no current reported problems

The BBC and Digital UK report there are no faults or engineering work on the Limavady (Northern Ireland) transmitter.

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
_______

Which Freeview channels does the Limavady transmitter broadcast?

If you have any kind of Freeview fault, follow this Freeview reset procedure first.

Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.

MuxH/VFrequencyHeightModeWatts
PSB1
BBCA
 H max
C41 (634.0MHz)382mDTG-320,000W
Channel icons
1 BBC One (SD) Northern Ireland, 2 BBC Two Northern Ireland, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 250 BBC Red Button, plus 13 others

PSB2
D3+4
 H max
C44 (658.0MHz)382mDTG-320,000W
Channel icons
3 UTV (SD) (UTV), 4 Channel 4 (SD) NI ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 NI ads, 18 More4, 26 ITV4, 30 E4 +1, 35 UTV +1 (UTV),

PSB3
BBCB
 H max
C47 (682.0MHz)382mDTG-620,000W
Channel icons
56 5SELECT, 101 BBC One HD Northern Ireland, 102 BBC Two HD (England), 103 UTV HD (UTV), 104 Channel 4 HD NI ads, 105 Channel 5 HD, 106 BBC Four HD, 109 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

COM4
SDN
 H -3dB
C40 (626.0MHz)379mDTG-810,000W
Channel icons
12 Quest, 20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 41 Legend, 42 GREAT! movies action, 46 Channel 5 +1, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 74 Dave ja vu, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 203 CITV, 208 POP MAX, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, plus 15 others

COM5
ArqA
 H -3dB
C43 (650.0MHz)379mDTG-810,000W
Channel icons
11 Sky Arts, 17 Really, 19 Dave, 31 E4 Extra, 36 pick, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 57 Smithsonian Channel, 60 Drama +1, 70 Quest +1, 75 Yesterday +1, 83 Together TV, 233 Sky News, plus 8 others

COM6
ArqB
 H -3dB
C46 (674.0MHz)379mDTG-810,000W
Channel icons
 FreeSports, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 88 Classic Hits, 235 Aljazeera English, plus 19 others

DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
DTG-8 64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)

Are you trying to watch these 0 Freeview HD channels?


The Limavady (Northern Ireland) mast is not one of the extended Freeview HD (COM7 and COM8) transmitters, it does not provide these high definition (HD) channels: .

If you want to watch these HD channels, either use Freesat HD, or move your TV aerial must point to one of the 30 Full Freeview HD transmitters. For more information see the want to know which transmitters will carry extra Freeview HD? page.

Which BBC and ITV regional news can I watch from the Limavady transmitter?

regional news image
BBC Newsline 0.6m homes 2.5%
from Belfast BT2 8HQ, 1,051km northeast (51°)
to BBC Northern Ireland region - 46 masts.
regional news image
UTV Live 0.6m homes 2.5%
from Belfast BT7 1EB, 1,051km northeast (51°)
to UTV region - 46 masts.

Are there any self-help relays?

Elliotts HillTransposer13 km SE Ballymena, Co. Antrim90 homes (according to B9 Energy)

How will the Limavady (Northern Ireland) transmission frequencies change over time?

1984-971997-981998-20122012-134 Sep 2019
C/D EC/D EC/D EC/D E TB E K T
C40SDN
C41BBCA
C43ArqA
C44D3+4
C46ArqB
C47BBCB
C48_local_local
C49tv_offArqB
C50tv_offBBCA
C54tv_offSDN
C55tv_offBBC1wavesBBC1wavesBBC1wavesBBCB
C58tv_offArqA
C59tv_offITVwavesITVwavesITVwavesD3+4
C62BBC2wavesBBC2wavesBBC2waves
C65C4wavesC4wavesC4waves

tv_off Being removed from Freeview (for 5G use) after November 2020 / June 2022 - more
Table shows multiplexes names see this article;
green background for transmission frequencies
Notes: + and - denote 166kHz offset; aerial group are shown as A B C/D E K W T
waves denotes analogue; digital switchover was 10 Oct 12 and 24 Oct 12.

How do the old analogue and currrent digital signal levels compare?

Analogue 1-4 100kW
BBCA, D3+4, BBCB(-7dB) 20kW
SDN, ARQA, ARQB(-10dB) 10kW
Mux 1*, Mux 2*, Mux A*, Mux B*, Mux C*, Mux D*(-21dB) 800W

Which companies have run the Channel 3 services in the Limavady transmitter area

Oct 1959-May 2006Ulster Television
May 2006-Dec 2014UTV plc
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Limavady was not an original Channel 3 VHF 405-line mast: the historical information shown is the details of the company responsible for the transmitter when it began transmitting Channel 3.

Comments
Wednesday, 28 October 2020
C
Chris.SE
sentiment_very_satisfiedPlatinum

9:20 PM

Francis Byrne:

Can't find any reports of any transmitters problems and it's not currently listed for Planned Engineering.
Is your aerial still ok in the severe weather?

link to this comment
Chris.SE's 3,170 posts GB
Monday, 2 November 2020
F
Francis Byrne
9:55 PM

Thanks for your reply. Hopefully so it is just temporary! I just had a new aerial put up a few weeks ago (a K channel band with 5G filtering). It was working fine at the time with a slight improvement on the weakest channels (such as the one Pop is on, ch 206) but over the last week, it has been dreadful. BBC1 has improved again in signal strength, slightly (60-65a%) but Ch4+1, Challenge are very poor now. Could be temporarily linked to the poor weather .. might have to contact my aerial man again to check.

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Francis Byrne's 6 posts IE
Tuesday, 3 November 2020
C
Chris.SE
sentiment_very_satisfiedPlatinum

12:49 AM

Francis Byrne:

Hmm. Does the Saorview predictor include results from NI transmitters, or do you have to rely on the aerial man?

The K Group aerial - if it's just for Limavady - may be "future-proofing" if at anytime in the future changes get made to move the channels down the band, but other wise a good Group B might be better because that might have slightly better gain at the higher UHF channels in the group. As I said though it will depend on whether the aerial is just for Limavady AND which K Group it is.

The problems you are describing are right across the UHF channels used by Limavady, which is leading me to think that reception either is marginal or there is unlisted transmitter work.

NB. For which channels are on which multiplexes, see Channel listings for Industry Professionals | Freeview
Also note that is due to change on 4th.Nov. with the LCNs 24-55 all going up an LCN and BBC4 Scotland going to LCN24.

link to this comment
Chris.SE's 3,170 posts GB
F
Francis Byrne
5:23 PM

Hi Chris,

Thanks, as always, for your replies. As it turns out, the channels are all back to their normal strength, except the mux which Pop is on (which despite its reported Mux power of 10kW on COM6, comes in much weaker than the others). It is unwatchable but at least appears again. It looks like the very poor weather at the start of the week was really degrading the reception.

I live relatively high up in Letterkenny, so am in a spot where I pick up both the Saorview muxes from Holywell Hill near the Derry/Londonderry border and the Limavady muxes, all in the same direction. Since RT are on ch 22 and ch 25, I have an aerial that covers ch 21 - 48. It's a Vision 48 element High Gain aerial from CPC (https://cpc.farnell.com/vision/122814/v12-x7fak-aerial-ch21-48-group/dp/AP03390?st=element)

You're correct - I'm at the edge of the reception range and the maps indicate similar. As I'm not in the UK, I can't use my postcode to check for signal reception. However, I used to get full reception with minimal issues during the very weak output pre-digital on the DTT channels (when the commercial muxes were on 800w). Ever since the move down the band, either the power was reduced or shielded in my direction to prevent as much overspill. I was hoping that the new aerial would give more gain than the older ch21 - 68 yagi I had but it's about the same as before - and possibly weaker. Meh. The aerial man showed me the before and after signals at the time - it's marginally weaker but with a cleaner signal/noise ratio. He also replaced my masthead amplifier which looked like it got slightly fried at one point of its 20 year lifespan.

I suspect if I went for a Group B aerial, I'd lose RT on Saorview, unless I combined it with a smaller aerial for the local Letterkenny transmitter for RT - but the combining of the two aerials would probably lose the few dB I'd gain by using a slightly stronger aerial?

I do have a Freesat box, so I'm not stuck as such - it's just nice not to have to keep swapping between the two (Freeview/Saorview and Freesat) and I only have an aerial socket upstairs.

Thanks and regards,
..Francis

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Francis Byrne's 12 posts IE
Wednesday, 4 November 2020
C
Chris.SE
sentiment_very_satisfiedPlatinum

1:30 AM

Francis Byrne:

Hi. Considering the transmitters you are going for then obviously the Group K is the correct one to go for, a Group B would likely lose ch22 & 25 or at best make then unreliable and the problem of combining two aerials would likely lose more than it would gain.
I'd guess the cleaner signal/noise ratio is down the the more modern masthead amp (does it have as much gain or more than the old one?).

Unfortunately less reliable reception is more likely these days as there is more frequency sharing (not just UK/Eire but Europe etc.) never mind all the extra interference coming from the significant increase in electronic devices of one sort or another.

What sort of signal strength and quality figures is your set showing in its tuning section for all the muxes?

link to this comment
Chris.SE's 3,170 posts GB
Friday, 6 November 2020
F
Francis Byrne
1:25 PM

Hi Chris,

As far as I can remember from the aerial man, the masthead amplier gain was a 25dB model, replacing the old one of the same strength (installed around 2000)

It is COM6 which is by far the weakest mux - I clicked on the ch46 oval where the list of channels is listed on this web page for Limavady, to see what other transmitters are also on ch 46 in NI / Donegal but I see the ukfree.tv's website has not yet been changed for the post-5G cutover? I'm wondering if there is another transmitter on that channel causing me some interference, as the others are relatively-speaking ok (as in, they are watchable - COM6 seldom is, except occasionally on my bedroom TV, which seems to get a marginally better signal). As "Pop" is on COM6, it matters to the kids :-) but they're now used to tuning it in on FreeSat

The mux strengths are as follows today, according to my 2009 Samsung TV:
PSB1: 70 to 72 (out of 100), bit error level: 0 out of 10
PSB2: 70 to 72, bit error level 0
PSB3: n/a: I *just* missed out on Freeview HD coming out on both my TVs by a year
COM4: 63, bit error level 1
COM5: 63, bit error level 1
COM6: 45 to 48, bit error level 7 out of 10 (basically, unwatchable at the best of times).

SaorView on ch25: 85, bit error level 0
SaorView on ch22: 85, bit error level 0

The reception appears to be affected now on really bad weather days on the COM5/6 muxes.

Thanks, ..Francis

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Francis Byrne's 12 posts IE
Sunday, 8 November 2020
C
Chris.SE
sentiment_very_satisfiedPlatinum

4:42 AM

Francis Byrne:

The Bit Errors for C46 may suggest interference of some sort. You haven't got anything with an RF output running have you, old VCR, games consoles etc. If so change the channels to something above 60 if possible.

Yes, it's a big disappointment that UHF Channel usage for each of the channels haven't been updated for all the post 700MHz changes.
C46 is used by a lot of quite/very low power relay transmitters but none very near you, and in most cases they also use C40 & C43. This is also true of the high power transmitters that use the same channels so why C46 should be affected is rather strange.

Just for reference some of the NI relays are Newcastle (800W), Kilkeel (400W), Cushendall (5W), Carnmoney Hill (16W), Camlough (500W), Plumbridge (5W), Edemy (11.2W), Lisbellaw (4W), Castlederg (2.2W).
Some of the high power (>10kW) ones are Preseli, Llanddonna, Bilsdale, Rosemarkie, Keelylang Hill, Black Hill, Heathfield, Hannington, Bluebell Hill, Sutton Coldfield, Tacolneston,
All are far enough away not to be an issue in normal circumstances.

Are the figures still the same now or have they changed? There has been some Tropospheric Ducting around which might have resulted in interference.

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Chris.SE's 3,170 posts GB
Wednesday, 2 December 2020
F
Francis Byrne
8:09 PM

Hi Chris,

My apologies for taking so long to reply .. life with young kids keeps one very busy!!
I have noticed that the reception with my newer aerial is very much weather-dependent. The better the weather the better the reception. Tonight the weather is not great (a lot of rain) .. and for the first time, I'm seeing even BBC1 showing some pixellation and signal strength only 50 - 60% (instead of 72%).

I'll probably need to contact my local TV aerial person back to have another look. I now wish I kept the older (ch21 - 68) aerial, which never exhibited this problem...

Thanks for all the info on nearby transmitters!

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Francis Byrne's 12 posts IE
Friday, 4 December 2020
C
Chris.SE
sentiment_very_satisfiedPlatinum

4:46 AM

Francis Byrne:

No problem, quite understand, there's other things that one needs to do! Although there had been some tropo around again which eventually cleared by Wednesday evening, it does sound rather like it's an issue with rain getting into the aerial connections or the coax somewhere. It may just be aerial position of course and a slight tweak could change things - it can just have effects on one channel, but if it varies with rain, I'm more doubtful that it'll be (just) position.

link to this comment
Chris.SE's 3,170 posts GB
Sunday, 13 December 2020
F
Francis Byrne
6:43 PM

Thanks, Chris. Hmm, I wonder if it is rain leaking in somewhere then! I'll have to check with my aerial guy. This evening after all the rain earlier, I am only getting the BBC mux, and SaorView. I'm not even getting Channel 4 or UTV (ITV)! (BBC is at 60%). I know that some coax cable had been changed from the mast head amplifier to the aerial, so that could be the culprit. My wife also told me that all channels break up when I use the paper shredder but I can't blame the rain on that one :-)

I'll let you know what comes out of it all when I get a hold of the aerial man.

Thanks!

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Francis Byrne's 12 posts IE
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